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Mike O'Sullivan

Mike O'Sullivan is the first General Counsel of Berkshire Hathaway Inc..

📝 Biography & Role

  • General Counsel Appointment: Announced in the 2025 Letter, O'Sullivan was welcomed as Berkshire's first General Counsel.
  • Corporate Office Expansion: His appointment represents a strengthening of the corporate office capabilities in Omaha to provide formal legal support while preserving Berkshire's decentralized culture.

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📚 Historical Mentions & Citations (1)

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2025 LetterReference Only
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